Measurements of magnetostriction constants of epitaxial garnet films by double-crystal x-ray diffraction
Magnetostriction constants lambda/sub 111/ have been determined at room temperature with the double-crystal x-ray diffraction technique by measuring a small change in the lattice parameter. Measurements were carried out for epitaxial garnet films of Y/sub 3/Fe/sub 5/O/sub 12/ and Sm/sub 0.85/Tm/sub 2.15/Fe/sub 5/O/sub 12/ grown on (111) oriented Gd/sub 3/Ga/sub 5/O/sub 12/ substrates; and also for flux-grown bulk single crystal of Y/sub 3/Fe/sub 5/O/sub 12/. Values of lambda/sub 111/ obtained were -1.7 x 10/sup -6/ for film and -3.0 x 10/sup -6/ for bulk crystal. lambda/sub 111/ of Sm/sub 0.85/Tm/sub 2.15/Fe/sub 5/O/sub 12/ was -5.0 x 10/sup -6/. The discrepancy in lambda/sub 111/ values between film and bulk Y/sub 3/Fe/sub 5/O/sub 12/ is almost accounted for by the fact that the film can deform only perpendicular to the film plane due to the shear force of the substrate. It has been experimentally demonstrated that lambda/sub 111/ does not depend on film thickness or lattice mismatch, which is consistent with the present analysis.
- Research Organization:
- Fujitsu Laboratories Ltd., Kawasaki, Japan
- OSTI ID:
- 5906845
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 53:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GADOLINIUM COMPOUNDS
MAGNETOSTRICTION
SAMARIUM COMPOUNDS
THULIUM COMPOUNDS
YTTRIUM COMPOUNDS
COMPARATIVE EVALUATIONS
DATA
EPITAXY
FERRITE GARNETS
FILMS
LATTICE PARAMETERS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEDIUM TEMPERATURE
MONOCRYSTALS
SHEAR
X-RAY DIFFRACTION
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
INFORMATION
MAGNETIC PROPERTIES
MINERALS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
360603* - Materials- Properties